Electrically-driven hair clipper



July 28, 1925. 1,547,193

N. o. ANDERSON ELECTRICALLY DRIVEN HAIR'CLIPPER Filed Nov. 28. 1924 f mmmmm 23 6 e y f6 e1 Patented July .28, 1925.

UNITED STATES PATENT oFFlcE. A

NILS OLAF ANDERSON, OF CHICAGO, ILLINOIS..

ELEcTRIcaLLY-nnivnn HAIR CLIPPER.

Application filed November 28, 1924. Serial N o. 752,542.

To all wcm t may concern Be it known that I, NILS OLAF ANDER- soN, a subject of the King of Sweden, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Electrically- 'ing electromagnetv and vibrating armature,

as well as the motive force or power thereof isA materially increased without the necessity of enlarging the clipper as a whole.

A further object of the invention is to provide a ball and socket joint between the movable or vibrating cutter and the actuating armature which will readily permit said cutter to make its full complete stroke without binding and so that said vibrating cutter may be held under an even tension against the fixed cutter during saidentire stroke. i l

These objects of the invention as well as the many advantages vthereof will more fully appear as I proceed with my specifi-` cation.

Fig. 1 is a top plan view of a hair clipper embodying my invention, with the cover removed to more clearly illustrate the interior construction thereof.

Fig. 2 -is a longitudinal vertical section through the same' as taken on the line 2--2 of Fig. 1.

F ig..` 3 is a transverse vertical sectional -view through the improved hair clipper as taken onthe line of Fig. 2.

Fig. 4 is a view on an enlarged scale of i the parts shown at the right hand end of Fig. 1, with. the tension member removed therefrom to more clearly show the con.- s'truction of said parts.

The imp-roved clipper includes a casing 1 which is of a length greater than its width and thickness and is of such dimensionsy and conformation as to have the proper feel when .held in the hand.` Said casing coma continuation of the magnet core.

prises a hollow, open `top body 2, and a cover 3, the body having a bottom wall 4 and side walls 5 and 6 respectively. The cover is comparatively shallow and rests at its side edges upon the side walls of the body, said body and cover .being secured together in any suitable manner. The corners of said cover and body are rounded and so .are the rear ends thereof as' shown in Figs.

1 and 2 so as to impart'the' desired shape and feel to-said casing. Thefront end of the casing 'is formed at an anglele'ssthan a right angle with respect to the bottom wall of the casing to provide an inclined seat to vwhich is secured in any suitable .manner,

a comb-like stationary cut-ter blade,7. AS: sociated with said stationary cutter. blade is a movable comb-like blade 8 which carries a block 9 on its top surface between its ends, said movable cut-ter being reciprocated transversely of the fixed cutter blade as willi later appear.

In the rear end of the body 2 is located a transversely extending block 10 preferably made of an insulation material, said block being secured inposition therein in any suitable manner. Forward of said block and adjacent the sidev wall 5 islocated an elec-iy tro-magnet 11, the 'rear end of which is lsuitably attached to said block and the front end of whichv carries a pole piece 12 foraging aid pole piece is cut on an angle at one side to provide a contact surface 13 of a substantially large area,- said contact surface being arranged in a vertical plane and extending at substantially an anglefof 45 to the axis of the magnet. By this angular arrangement the contact `surface 13 is greatly increased' without increasing the size of the 'magnet The forward end of saidmagnet is held in position by means of a screw 14 which passes through thel side wall of the body and is threaded into said pole piece as shown in Fig. 1.

Between said magnet 11 and the side 'I wall 6 is 'located an edgewise arranged armature bar 15 which extends substantially parallel with the magnet. The rear end of said bar isbifurcated to embrace a part of theblock 10 and a vertically disposed pin 16 pivotally connects said armature bar to said block. The front end of said bar terminates in an enlarged head 17 which is' cut awayon one side to prov-ide an angularly disposed Contact surface' 18 which is comA through the bottom wall of the body. By-

-may be engaged by the head plemental to and is adapted to be attracted by the Contact face of the pole piece 'of the magnet when the `same is energized in the manner well known. The -front end of the head carries a ball 19 which normally seats in a socket 20 in a block 21 fixed to the movable cutter blade 9. 'Upon that side of the armature bar 15 opposite the magnet and near the head is provided a lug 22 in which rests the forward end of an edgewise disposed duplex tension bar 23, the rear end of which is secured by a screw 24 to a vertical shoulder 25 on the block 10. Said tension bar performs two functions, the first to urge the forward end of the armature bar downwardly so that the movable cutter blade may bear firmly against the fixed blade and second, to swing the armature bar away from the magnet when the same is de-ener, gized. This last movement of the armature bar is limited by a stop screw 26 threaded through the side wall 6 and adapted to be of said bar.

To move the tension bar 23 downwardly I provide thereon a yoke block 27 into which threaded a screw 28 which extends turning the screw in the proper direction the desired tension on the movable cutter blade with reference to the fixed cutter blade .easily attained. A `second screw 29 i is threaded through the side wall 6 of the lateral fiexing of the tension bar,

casing and engages said yoke block so that said block which determines the point of may be properly adjusted. By turning the screw in one direction or the other the block 27 is movedtoward or away from the side wall 6 which, of course, will induce the desired tensin for lateral movement of the armature. As the lateral adjustment of said block is relatively small, the head of the screw 28 is'so formedto permit the 'screw to rock to compensate for the adjustment of the block 28. 1/

Mounted on the top surface of the head j of the armature bar is a resilient member of Va substantially Y-shaped formation and including a body 3() and two spaced arms 31-.31. Said member is arched longitudi-V nally and the ture bar just tothe rear of the head by a screw 33 and the forward ends of said spaced arms engage upon and are fixed to the block 21 on the movable cutter bar by screws 34-34. A screw 35 passes through the middle of the arched part of the spring member and is threaded into the head of the armature bar. By means of said screw the Y-shaped spring member may'be adjusted to impose the proper tensionr upon said movable cutter bar at points spaced on each side ,of the ball and socket joint -19 and `2O before, mentioned. By means of this construction a positive and even tension is imbody is secured to the arma.

direct-ion to the movable cutter blade.

posed upon the movable cutter blade at points near and between its ends so that said blade is held evenly and flat against the fixed cutter blade. Thus, the movable blade is held against `any twisting with respect to the fixed cutter blades so that the comb-like teeth are always parallel and will wear down evenly without becoming dull.

3G indicates one of the current conductors which passes through an insulating thimble in the rear end of the body and is operatively connected to the magnet coil winding at the forward end thereof. 37 indicates the other current conductor which also passes through said thimble and is secured to a spring Contact finger 38. Said finger is fixed to the block 10 near the side wall 5 and extends toward the longitudinal median plane of the casing. A second leaf spring 39 is also fixed to the block 1() and bears `against the finger 38 to increase the resiliency thereof. Said contact finger normally engages upon a fixed contact 40 which is Asecured to the top of the block 10 and is operatively connected to the coil winding at the rear end of the magnet.

Means are provided for moving said finger 38 out of engagement with said fixed Contact and said means are as follows 41 indicates a switch member rotatively mounted at its forward end in the block'10 and having a turning knob projecting beyond the rear end of the casing, said switch member being lo. cated in the median plane of the casing. On said switch member adjacent the block is a ratchet cam member having pairs of diametrically op-posite high and low recesses 42 and 43 respectively and associated with said pleted and the same is energized. When the magnet is energized the pole piece attracts the armature and causes it to engage said pole piece imparting a reciprocation in one Thus the current pulsations of an alternating electric current, due to the rise and fall of the electromoftive force of each cycle will cause the armature to vibrate in unison with said cycles toward and awayfrom the pole piece; vibrating the movable cutter blade upon the fixed cutter blade.

degree of tension between said cutter`blades may be secured and maintained.

While in describing my invention I have Bymeanspf the adjus-tments heretofore described, the proper referred to the same as` embodied in a liair l yfixed cutter blade, a movable cutter blade,

a vibratory armature operativelyconnected ait one end to saidgmovable cutter blade and pivotally, ',mounted, at its other end for a swinging movement `about a vertical axis, means operable tocause said armature ,to bear down upon said movable cutter blade, said means comprising a spring member extending parallel with said armature and also normally acting to urge said armature laterally i-n one direction,

2. A hair clipper embodying therein a fixed cutter blade, a movable cutter blade, a. vibratory armature operatively connected at one end to said movable cutter blade and pivotally mounted at its otherfend for a swinging movement about a vertical axis,

said armature having a lug near said first mentioned end, and an edgewise disposed flat spring fixed at one end near said pivoted end of the armature and engaging at its other end upon said lug, and means operating upon said spring member to vary the tension thereof and to regulate the down- Wardppressure it imposes on said armature.,

3. A hair clipper embodying therein, a casing, a fixed cutter blade at one end of the casing and a block member in the other end of the casing, an eleotromagnet secured at one end to said block and extending parallel, with and adjacent to one side wall of thel casing, said magnet having a pole piece with an angularly disposed contact surface at the' other yend near said fixed cutter blade, a sec'- ond cutter blade movable-upon the fixed cutter blade, an armature arranged parallel with said. magnet` and having one end pivotedin said block and having a head atthe other endA with a contact surface comple-- mental to that of said pole piece, means connecting said armature head to the second cutter blade, and a spring member mounted at one end to said block and operatively connected at its other endA to said armature-near said head, said spring member capable of ,being actuated to impose Iboth a downward pressure and a lateral vtension in one direcltion to said armature.

4. A hair clipper embodying A therein, a fixed cutter blade, a movable cutter blade reciprocable thereon, a vibra/tory ,armature having a head at one end, means roviding a ball and socket joint between saidp head and movable cutter blade, an arched spring lixed at one end to said armature and at its other end to said movable cutter blade, and a screw threaded into said head and passing'through said spring between its ends to vary the tensionof said spring. f

In testimony whereof, I havevhereuntoset my hand, this 10th day of November, 1924.

' NILS OLAF ANDERSON. 

